Locking-latch



(ModeL) A'.B.PROUTY.

LOCKING LAT-GH- No. 266,389. Patented 00a. 24, 1882.

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AUGUSTUS B. PROUTY, OF WORCESTER, MASSACHUSETTS.

LOCKING-LATCH.

SPECIFICATION forming part of Letters Patent No. 266,389, dated October 24, 1882.

Application filed December 17, 1881.

To all whom it may concern:

Be it known that I, AUGUSTUS B. PROUTY, of Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Night-Locks; and I declare the following to be a description of my said invention sufficiently full, clear, and exact to enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The object of my presentinvention is to provide a practical and efficient night-lock mechanism adapted'for use in connection with that class of knob devices wherein movement is imparted to the latch-bolt by means of a pushbar and angle-lever.

I attain this object by mechanism constructed and organized as shown in the accompanying drawings, the particular subject-matter claimed being hereinafter definitely specified.

Figure 1 is a side view of my improved nightlock mechanism with the side of case removed and face partially in sectional view. Fig. 2 is a vertical sectional view at line 00 or, looking in direction as indicated by arrow. Fig. 3 is a horizontal sectional view at line y 3 Fig. 4 is a horizontal sectional view at line a c. Fig. 5 is a plan view of the half-bar of latch-bolt, and Fig. 6 shows detail of form of the thumbslide or dog-piece.

Letter A denotes the case, constructed substantially in the ordinary form, with face-plate B attached thereto, and with the requisite lugs, flanges, and recesses for the reception and support of the action mechanism. If desired, the case may be made to contain a dead lock in addition to the night-lock mechanism herein shown and described.

The latch-bolt G, I make in two parts, 0 and 1 each of which is provided at its rear end with a log or bearer-plate, c, for engagement with the knob mechanism for drawing back the bolt, the part 0 being arranged to be actuated by the knob or handle on the inner side be operated by the knob or handle on the outside of the door. The bearing-plates c are in the present instance adapted for knob mechanism such as described in my Letters Pat- (ModeL) ent Nos.'222,907 and 224,040, and the upper portion, 0. is arranged to carry the beveled catch-head. The bar 0 is provided with projections d 6, one of which serves as a guide and stop lug, while the other serves as a hearing for the returning-spring D and key' slide E. The bar 0 is made shorter than the bar 0. Its end occupies a position within a recess at the lower side of bar G, and it is furnished with a projecting head. f. for engagement with the thumb-slide or dog F. The bar 0 and thumb-slide are in the present instance of the forms respectively shown in Figs. 5 and 6, said thum b-slide being furnished with an arm, F, offset to clear the key-slide E and lug d, and

slide is moved up it will engage the head f the latcli-boltG; but when said slide F is moved downward said bar 0 will be released, and can then be actuated by the knob mechanism. The returning-spring Dis arranged about a. small bar, D, which passes through the log (1 and has its rear end set into a recess at the back of the case. The wire of the spring is passed through asmall slot in the rear end of the bar, the latter being hammered down upon the wire so as to clamp the parts together, while the wire forms a shoulder or stop which prevents the bar from slipping back through the recess, as indicated at to, Fig. l. The lug (1 slides freely on the bar, compressing the spring when the latch-bolt is moved back. The strain of spring retains the rear end of the bar D within its recess at w. H indicates a lug located between the parts 0 and G which serves as a guide and support for said parts. The slide F is provided with a thumb-lug, g", projecting through a suitable opening in the face-plate, whereby said slide can be operated, and with a spring, F strained between lugs which spring works in connection with a lag, a, on the inner part of the case, and serves to retain the slide in adjusted position. The keyslide E is supported by suitable guiding-lugs, m, and is provided with a recess near its rear end for the reception of the key K, and at its forward part with guards I and J for engagement with the tumbler-bars L. The forward end of said slide E is extended upward to enand prevent the movement of the part 0 of) arranged in such mannerthat when said thumbat the upper and lower ends of said slide-piece,

gage the lug d of the latch-bolt in the manner illustrated. The lug a serves as a stop for the forward movement of the slide E. The tumblenbars L are constructed and arranged, substantially as shown, with their rear ends pivoted on the fixed stud N, with their forward ends working in conjunction with the two guards I and J, a flange, n, being provided on the lower part of slide E for supporting said tumblers L when the slide E is in normal position. This arrangement of the tumbler-bars forms a part of the subject-matter of a separate application for Letters Patentt'or improvements in locks executed by me on even date herewith.

If desired, the position of the parts 0 C of the latch-bolt can be reversed, the part 0 being placed below and the part C above; or said parts may be arranged side by side, if preferred and the spring D can also be located above instead of beneath the latch-bolt withoutdeparting from the nature of my inven tion. \Vhen the thumb-slide F is down the latchbolt can be operated by the knobs on both the outside and inside of the door; but when said slide F is up the half-bar G is locked so that said part cannot be operated by the outside knob, and the latch-bolt can then be drawn back only by means of the inside knob or the key action.

The night-lock mechanism constructed in accordance with my invention is simple, durable,

and eflieient in its operation. It can be manufactured at comparatively small cost, and its parts are not liable to become deranged or impaired by constant use.

What I claim as of my invention, and desire to secure by Letters Patent, is-

l. Thelatch-bolttormed in two parts, respect ively adapted to be independently actuated by the outside and inside knob deviees,in com bination with a key-actuated mechanism for moving one part of said bolt, substantially as set forth.

2. The combination, substantially as de scribed, ofthe latch-bolt, formed in two parts, adapted for independent action by the respecti've knob devices, the thumb-slide for dogging or looking one portion of said bolt, the keyslide, and the tumbler mechanism, organized and operating as set forth.

3. The combination, substantially as described, of the latch-bolt C, provided with lug d, the spring D, and bar D, the slide E, with guards I and J and flange a, and the tumblerbars L, constructed and operating as set forth, and for the purposes stated.

\Vitness my hand this 18th day of January, A. D. 1881..

AUGUSTUS B. PROUTY.

\Vitnesses:

CHAS- H. BURLEIGII, S. E. KING. 

